Agnomen — Ag*no men ([a^]g*n[=o] m[e^]n), n. [L.; ad + nomen name.] 1. An additional or fourth name given by the Romans, on account of some remarkable exploit or event; as, Publius Caius Scipio Africanus. [1913 Webster] 2. An additional name, or an epithet … The Collaborative International Dictionary of English

Agnomen — An agnomen (plural: agnomina ), in the Roman naming convention, is a nickname, much like how cognomen was initially. However, the cognomina eventually became family names, so agnomina was needed to distinguish between similarly named persons.… … Wikipedia